Ever since the 20th century, there has been a diminishing expectation placed upon scientists to engage in philosophical thinking. My background is primarily in mathematics, physics, and philosophy. I can tell you from personal experience that many professional theoretical physicists spend a tremendous amount of time debating metaphysics while knowing almost nothing about it, often being totally unaware that they are even doing it. If cognitive neuroscience works anything like physics then it’s quite possible that the total exposure that this professor has had to scholarship on the philosophy of the mind was limited to one or two courses during his undergraduate.